Ok, so after many weeks trying to fix this.. I have a 2013 Silverado LT 4x4 extended cab 4.8L. A couple months ago I was driving thru deep snow and my parking lights went out. (not sure if that was a coincidence or not) Anyway.. I checked the 3 fuses under the hood, all had no power) I switched the relay for the parking lights, didn't fix. I looked at fuses, none were blown. I replaced the distribution block where tail lights plug in with lic plate lights and trailer lights. (was a little corroded, didn't fix the problem) If I run a power wire into the feed side of the fuse block under the hood ( half fuse goes into the power side other half goes to the lights. ) the parking lights work... By the way all the other lights work (headlights, turn signals, brake lights) I tried looking for maybe a faulty ground but wasn't sure where one would be that connects just the park lights. Please help. Im at my wits end... Any help would be great